Those NE-2s have a high breakdown level.  OK for vacuum tube equipment, but too high for semi-conductors.

73,
Don W3FPR

On 6/29/2021 2:16 PM, Ray wrote:

In the Early days we used a NE-2 for  front end Protection…..

Ray WA6VAB  K3

*From: *Frank Krozel <mailto:[email protected]>
*Sent: *Tuesday, June 29, 2021 9:33 AM
*To: *[email protected] <mailto:[email protected]>
*Cc: *Elecraft Reflector <mailto:[email protected]>
*Subject: *Re: [Elecraft] K2 / ESD / Diodes D16 7 D17 replaced

Don as usual “Thank you”



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